Casting-mold



F. HACHMANN.

CASTING MOLD. APPLICATION FILED JULY 5, 1918- RENEWED MAY I5, 1920.

Unirse rnnnnaioir HACMMAMN, or s'r. Louis, Missooiai, Assienorefisr MEsNri1 lasereni Meurs, To NATIONAL METAL DIE MOLD COMPANY, or sin Louis, MIssoUitI', A

CORPORATION OF MISSOURI.

'p Specification of Letters Patent. Y' v125mm-lunga OdC-ti. 26, 1920.

Application led July 5, 191.8,l Serial No. 2473,2179. Renewed vMayV 15,' 1920. Serial. No. .'.81,7' i4 To all whom t may concern MANN, a citizen of the United States, residing at the city of St. lLouis and State of lF/issouri, have invented a new and useful Casting-Mold, of Which the Iiollowing isa specification.

VThis invention relates to casting molds.

An object koi the invention is'to provide a casting mold having a mold cavity adapted to form a casting and having oneor more pockets or chambers adapted to contain a substance which, when subjected to heat of the mold, Will .be converted into a volatile carbonaceous matter, and vpassages forconducting the carbonaceous matter. into the mold cavity where it Will adhere to the Wall of the cavity and prevent adhesion ofthe casting. Y

Another objectis to provide an improved casting mold having novel and eificient means for producing andV conducting tothe Wall of the mold cavity avolatile carbonaceous'matter that Will prevent adhesion of the casting. i

Other objects Will appear from the following description.

Figure l is a plan'vievvof aA mold confV structed in accordance with my invention.

Fig. 2 1s a side elevation.

Fig. 3 is an elevation looking towardlan#l other side of the mold. l e

Fig. 4 is an elevation ota portion of the mold viewed along the line i-lv of Fig. 1.

Fig. 5 is a sectional View on the line 5 5 'ofFigJJa` Fig. 6 is a sectional view on' the line 6 6 of Fig. 4. .Y

Fig 7 is an enlargement of a portion of the elevation shown in Fig. e. i Fig. 8 is a view looking'along the line 8 8 of Fig. 2. v

The mold body'is composed of adjacently disposed sections and comprises bottom inembeis lV which support' the sections Jforming the mold cavity, members 2 having match` ing recesses Which, when said lmembersare properly placed, form a mold cavity; and a top composed of membersl removably sup- -jfported by the members 2;. In the particular embodiment illustrated the mold b'odyhas two cavities adapted toV form castings and the top has riser openings 4f. The top also Y has anV opening 5 intowhich the material to beccas't'is poured and 'from ,Which the materialis conducted to the ymold cavities through gates or A passages 6. .The several members composing the mold body arel held together by vpins Zon certain of theimemf e bers engaging in holes in the otherlmembers.` .The members 2V forming the mold cavities Y Y are provided with onel or more pockets or chambers 8 adapted to contain a lubricant or .other substance Which, lwhen subjected to the heat of the mold, Willform a yvolatile carbonaceous matterto be applied ,to the Wall of themold cavityand thereby prevent' adhesion of the casting. From each ofthe pockets or `chambers 8 one or more upwardly inclined passages 9 is provided to the mold cavity fo conducting lthe volatile carbona- Vceousiiiat er to theinold cavityfor the purpose stated. Fiachof the'pocketsv or cham'- bersv8 yis also provided with an inlet-.or'supply passage 10 communicating Witha receiving chamber 11' 'having an inlet passage'lQ through which therlub'ricant vor other substance may bedelivered into the chamber 11. f

It Will be notedthatthe passages 9 are lup- Wardly inclined, so thatthe points at which they open into the mold cavity are considerably above the Wallsjof the pockets 8. This inclination of the passages 9 prevents the Alubricant or other .substance in the pockets 8 from passing or oiving'thr'ough said passages, ,While at the same time permitting the` volatile carbonaceous*matterl to rise romthe pockets and enter the Amold cavity. l

. In 'order tov insurev escape of *theV .gases from the mold cavity yduring castingoperation, a numbery of passages 13;` are pro-f vided, lthe same communicatingfvvith the mold,v cavity either directly or through the encetoFig.7.p. y l, v Inaddition to the-pockets 8 another series passages 9. as Will `be understood by refer-l of pockets 14 are provided in the moldbody, the vsame havingfsupply. passages 15VA communicating With' a receiving'chamber 1,6. adapted ;to receive oil .or `other materialV ioo through Ypassages 17.} In this. instance a pluy rality of-passages 18 openfrom thepassages l5 into .the mold cavity. The passages 18,

illustrated oliagrammaticallyY in Fig. .6, eX-. tend .'obliquely upwardly `from'A the .passages l5; and yWherever the said passages 15'l inf; tersect the Vpockets 14, the inner ends of such i intersecting passages are considerably above theN level of the substance in said pockets, so thatyit is impossible for such substance to flow or. pass into the mold cavity. However the volatile carbonaceous matter, which isthe result of the substance in the pockets being heated, is free to pass into the mold-- cavity where it adheres to the wall of said cavity and prevents the adhesion Vof the casting.

It will be notedY that it is impossible for the lubricant or other material that might be used'to pass` into the mold. This is a desirable result as I have. found that in many instances where the lubricant passesy in-to the mold cavity spots and imperfections onthe casting are-the result; whereas, when volatile carbonaceous matterfalone is deliv- Y ered into the mold cavity no such spots or imperfections result. Y Y

Asshown in Fig. 4 a numbeiof venting passages 19 from each mold' cavity open into an outlet passage 20 in order to give further assurancethat the gases may escape from lthe moldrcavity during the casting operation. Y K Y Q 'It' is apparent Vthatrthe specific yconstruction and arrangement illustrated may be varied'widelyfwithout departure from the principle of the inventionwhich consists in Y matteris vformed from entering the mold supplyingfa volatile carbonaceous matter to thewall of the mold cavity and preventing the material from whichY such carbonaceous Vcavit The venting assaves constitute an Y D D Vadditional feature of advantagev so that the moldY is of high efficiency insuring the escape y terial being cast of the gases from below the level `of the maduiing. the casting operation. v y Y l Iclaim: I f A 1f A casting mold, comprising a mold Y body having a cavity adapted to form a casting, a plurality of pockets formed in said moldbody adapted to contain a sub stance ffor formingy volatile `carbonaceous matter, and passages for conductin'g'the carbonaceousy matter from saidpockets to Vthemold cavity. Y

A2. A casting "mold, comprising' a mold body Ycomposed of separable sections ai'- rangedin position to form a mold cavity adaptedtol form a casting, a passage for conducting the material to be castrintol the mold cavity,pockets arranged to contain a substanccffor Vforming volatile carbonaceous ,Y matter, passages for conducting volatile car# bonaceous matterfrom said pockets to theV 'mold cavity, and venting passages through the'mold wall adapted to insure theescape of the gases from the mold`- lcavity during the casting operation .r

3.,A Vcasting mold, comprising a .mold

*body*v composed' of separable vsections ari- `ranged .in position'to form a mold cavity adapted to form a casting, a passage for conducting the material to be cast into the f Y casting, pockets in the mold body adapted yto contain a substance to form volatile carbo* naceous matter, passages for conducting said substance into said pockets, and passages for conducting the Yvolatile carbon'aceousI matter formed by said substance from said pockets into the mold cavity. 7

5.- A casting mold, Ycomprising a mold body Vhaving a cavity/adapted to form aY casting, pockets in said body adapted Vto contain a'vvsubstance'toform volatile carbody having a cavity adapted to forni a bonaceous matter,A passages for conducting the substance into said pockets, and passages 4from said pockets for conducting the volatile carbcnaceous matter from said pockets into the mold cavity, said'lastnamed Ypas Sages being inclined upwardly from said pockets wherebythe'subst'ance in said pook? ets is' prevented from lowingjinto the mold cavity while the volatile carbonaceous 'mate ter vis permitted to pass into'the mold cavity.

6. A' casting mold, comprising ar mold body having a cavity adapted to fornr aV casting, pockets insaid Ybody* adapted to contain a substanceV to form volatile carbona-y ceousrmatter, Ypassages for conducting the substance into said pockets, passages from` said pockets for conducting the volatile carbonaceous matter from said pockets into the ing inclined upwardly from said pockets whereby the substance .in said pockets is prefl vented from flowing into the mold cavity while the volatile carbonaceous,matter is permitted tov pass into the mold cavity, and

venting passages through the mold wall adapted to insure the escape of the gases from said cavityv during the casting *opere anon. y n 7. A` casting mold, comprising amold Y body having a' cavityadapted to forni "a casting, pockets in the mold body adapted to contain a substance vthat will form vela# tile carbonaceousmatter, passages for conducting the substance into said pockets, pase sages for conducting the volatile carbone- Vmold cavity, said last-named passages ibeceous matter from poclretsinto the mold cavity, venting passages lcommunicating with said last-named passages 'for con ducting the gases from the mold cavity dur-` Y sure the escapeot the gases trom-the mold cavity during the casting operation.

S. A casting mold, comprisinga mold bony having a cavity adapted to* *form a casting, a passage for conducting the material to be Cast into the mold cavity, pocketsV in the mold body adapted to contain a substance to form volatile carbenaceous matter, passages extending obliquely upwardly and inwardly Jfrom said pockets tor conducting the volatile carbonaceous matter into the mold cavity, a series of downwardly inclined venting passages from each mold cavity, and a passage for receiving the gases from the venting passages whereby Y theV gases are discharged yduring the casting operation.

9. A casting mold, comprising a mold body composed of a series of separable sections arranged to form a mold cavity adapted to form a casting, a passage for conducting the material to be castv into the mold cavity, a series of pockets adapted to contain a substance to forni volatile carbona-v ceous matter, passages from said Vpockets for conducting the volatile carbonaceous matter into the mold cavity, venting passages intersecting said passages adapted to insure escape ot the gases from the mold cavity during the casting operation, anda series of additional 'venting passages from the mold cavity Jfor conducting the gases therefrom during the casting operation.

l0. A casting mold", comprising a mold body having a cavity adapted to torni a casting, pockets in said body, upwardly inclined passages from said pockets for conducting volatile carbonaceous matter from said pockets into the mold cavity, venting passages intersecting said first-named passages adapted to insure escape ot' the gases from the mold cavity during the casting operation, a discharge passage in the mold body itor discharging gases, and a series of venting passages from the mold cavity opening into said discharge passage and adapted to insure escape of the gases .from the mold cavity during the casting operation.

ll. A casting mold, comprising a mold body having a cavity adapted to form a casting, Dockets in the mold body adapted to contain a substance to form volatile carbonaceous matter, passages from said pockets to' the Vmold cavity for conducting the volatile carbonaceous matter from said pockets to the mold cavity, said passages being inclined upwardly from said pockets to prevent the substance in said pockets from tlo f*- ing therefrom into the mold'cavity, a receiving chamber, a passage for conducting said substance into the receiving chamber,

and passages from said receiving chamber to said pockets respectively for conducting said substance from said receiving chamber to said pockets,

"12. A casting mold, comprising a mold body having acavity adapted to form a casting, pockets Vin the mold body adapted to contain a substance to form volatile carbonaceous matter, passages from said pocketsto the'mold cavity for conducting the volatile carbonaeeous matter from said poele ets to the mold cavity, said passages being inclined upwardly from said pockets to p revent the substance in said pockets from flowing therefrom into. the moldcavity, a re'- ceiving chamber, a passage orfcon'ducting said substance into' the ,receiving chamber,

passages from said receiving chamber tov said pockets respectivelyv for conducting said substance from said receiving chambersv to said pockets, and venting passages through the mold Wall adapted to insure the escape of the gases during the casting operation. Y

18. A` casting mold, comprising a mold body having a cavity adapted to form` a casting, a pocket formed in said moldV body adapted to contain' a substance for forming carbonaceous matter, and a passageV from said pocket to the vmold ,cavity above the level of the substance in said pocket whereby` the carbonaceous matter will be conducted from. said pocket to the mold cavity, and the matter in said pocket will be prevented from passing into the moldcavity. l Y

14. A casting mold, comprising a mold body composed of separable sections arranged in position to form a mold cavity adapted toy form a casting, a passage Jfor conducting the material to be cast into the mold cavity, a pocket in the mold body ar`V ranged to contain a substance for forming volatile carbonaceous matter, apassage for vconducting volatile carbonaceous matter from said pocket to the mold cavity, said passage being above the level of the substance in said pocket, whereby the vo-latile carbonaceous matter may pass into the mold cavity while said substance is prevented` from passing into the imold cavity.

l5. A Vcasting mold, comprising a mold'V body composed of separable sections arranged in positionto form a mold cavity adaptedto vform a casting, a passage for conducting the ,material to'fbe cast into the mold cavity, al pocket in the mold body arranged to contain a substance 'for forming volatile carbona'ceous matter, a passage for conductii'ig` volatile carbonaceous matter, `fromv said pocket to the mold cavity, saidV passage being above the levelV of the substance in said poclret, whereby the volatileV carbonaceousmatter maypass-into the mold cavity while said substance is prevented from passing into the mold cavity, and venti ing passages through the mold wall adapted to insure the escape of the gases from the mold cavity during the casting operation.

16. A casting mold, comprising a mold body having a cavity adapted to form a casting, a pocket formed in said mold body adapted to contain a substance for forming carbon'aceou's matter, a passage from said pocket to the mold cavity above the level of the substance in said pocket whereby the carbonaceous matterwill be conducted from said pocket to the mold cavity, and the Aoarbonaceous matter, and a passage "from saidv pocket for conducting thevvolati'le carbonaceous matter to the mold cavity.

18.V A casting mold, comprising a Ymold* body having a cavity adapted to form a casting, a pocketV in the mold body Vadapted to Contain a substance for forming volatile carbonaceous matter, a passage vfor conducting said' substance into the pocket, and aV passage from the pocket opening into the mold cavity.

FREDERICK HACHMANN. 

